ok, this problem does not appear right. They are 10 to the -5 power, 10 to the 3rd power, 10 to the -4 power and 10 to the 10th power. (8.07 x 10 -5) x (7.00 x 10 3) is over (3.70 x 10 -4) x (9.67 x 10 10)
(8.07 x 10-5) x (7.00 x 10 3)
(3.70 x 10-4) x (9.67 x 1010)
I got 1.6 x 10 -8
If you can understand what I am asking, PLEASE help me!
2006-09-19 20:03:56 · 7 answers · asked by noodlenmac0329 2 in Science & Mathematics ➔ Mathematics
Well i tried and got the following:
(8.07 x 10-5) x (7.00 x 10 3) = 0.5649
(3.70 x 10-4) x (9.67 x 10 10) = 35779000
Therefore what we have is 0.5649 over 35779000
I worked this out to be 1.5788 x 10-8
Which to two significant figures would be 1.6 x 10-8
So either you got it right first time or i'm missing something.
Hope this helps
2006-09-19 20:24:12 · answer #1 · answered by Prowler 1 · 0⤊ 0⤋
Need 3 numbers in significant figures because that is the lowest accuracy which you have. You can only be as accurate as the data given, if it was 2 significant figures and 3 significant figures then you use the 2 significant figures
For example 7.00 has 3 significant figures.
1.58 x 10^-8
2006-09-19 20:14:42 · answer #2 · answered by Emma Lee 2 · 0⤊ 0⤋
((8.07 * 10^-5) * (7 * 10^3)) /((3.7 * 10^-4) * (9.67 * 10^10))
= (56.49 * 10^-2) / (35.779 * 10^6) = 1.58 * 10^-8
I got the same answer as u (mass of an electron is it?)
2006-09-19 21:39:25 · answer #3 · answered by Anonymous · 0⤊ 0⤋
no that's wrong,
an example:
1.00 * 1.0 = 1.0 ----- 1.0000000000 * 1.0000 * 1.0 = 1.0
always the significant figures of the answer is the same as the least sig. figures of its factors. in the examples above, 1.0 has two sig figures and the answer must also have two sig. figures.
Answwer:
8.07, 7.00, 3.70 and 9.76 have all three sig. figures so the answer must also have 3 sig. figures but 1.6 has only two sig. figures.
so the answer is 1.58 * 10 power of something. Note that 1.58 has three signifance figures.
righht?
2006-09-19 20:07:53 · answer #4 · answered by ___ 4 · 0⤊ 1⤋
you got it right ... tho you might want to use 1.58 insteead of "1.6" since the "given" data has similar 'depth' of precision [ie three signif digits]
2006-09-19 20:34:24 · answer #5 · answered by atheistforthebirthofjesus 6 · 0⤊ 0⤋
so we have:
0.0000807 x 700
---------------------------------- =
0.00037 x 96700000000
0.05649
--------------
35779000
=1.5788591072975767908549707929232 x 10 ^ -9
approx. 1.6 x 10 ^ -9
I hope this helped! It's almost the same as yours really.
2006-09-19 20:18:14 · answer #6 · answered by cool_person 2 · 0⤊ 0⤋
Why can't you use a calculator?
I assume that in a Chemistry class they aren't going to ask you to do all that by hand.
2006-09-19 20:18:05 · answer #7 · answered by Demiurge42 7 · 0⤊ 1⤋